registry team mailing list archive

[Matt Sealey <matt@xxxxxxxxxxxxxx>]

I can confirm this happens on the Efika MX Smartbook (armel) too with
the kernel from Genesi's gitorious repository. Our battery is SBS
compliant and publishes all the same power supply attributes as a
standard ACPI SBS battery. There is a custom driver in play (efikasb-
battery) however this doesn't seem to be the root cause; we occasionally
get kernel messages that certain sysfs attributes could not be read, and
battery life never estimates properly and the battery is always reported
as red, and empty (0%) in the icon.

Considering SBS batteries have accurate lifetime count which is
published in sysfs (pulled right from the charger) I would have expected
that this be used to determine the battery life in the first instance
before any clever averaging and determination of power usage is
performed, and the battery life and capacity (also reported in sysfs..)
be used directly since the LiIon/LiPoly charger is pretty smart (hence,
smart battery..) - I can read sysfs fine and tell that I have 4h50 of
battery life left give or take a minute or two (291 minutes) and the
average drain time is around 280 minutes.

Quite why gnome-power-monitor doesn't seem to take notice of this data
is puzzling..

-- 
Battery life estimation never comes around
https://bugs.launchpad.net/bugs/629258
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